f(x)=3x ,g(x) = x2 find gof(x)
What motor is NOT suitable for use as a DC machine?
Squirrel cage motor
we can either use dc series motor or induction machine ,but dc supply is not easily available so we use induction motor ,
dual H- bridge use to drive DC motors
The slip rings are the most important brush in DC machine.
swinburne's test on dc shunt machine is to predetermine the efficiency of the dc machine , but it is not accurate it is just like estimation of efficiency of dc shunt machine when it is run as a motor and a generator............................
take care of the problem of induced AC field current due to armature reaction /Omara
it is a machine which operates on the dc power source.
05 types of dc machines
equation of ac machine
to convert the DC into DC.............
A DC generator is a DC machine that is driven by an external rotating force. It is constructed the same as a DC motor.